Eastman, N., & Hellman, L. M. (1961). Williams Obstetrics (12.ed.). Appleton-Century-Croffts.
Chicago-čujuhus (17. p.)Eastman, Nicholson, juo Louis M. Hellman. Williams Obstetrics. 12.ed. New York: Appleton-Century-Croffts, 1961.
MLA-čujuhus (9. p.)Eastman, Nicholson, juo Louis M. Hellman. Williams Obstetrics. 12.ed. Appleton-Century-Croffts, 1961.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.